From 7fa74d1020c6cc98753da3df469525c64ac8c3c7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20M=C3=B6bius?= <moebius@cs.rwth-aachen.de>
Date: Thu, 10 Jan 2013 08:24:47 +0000
Subject: [PATCH] Christopher:

Render interface updated to simplify the creation of new render-plugins
New Depth Peeling Renderer based on the new interface
Simplified Shader Pipeline Renderer due to the changes in IRenderrer

Jan:
Split RenderObject out of IRenderer File
Updated Documentation of IRenderer

refs #1377


git-svn-id: http://www.openflipper.org/svnrepo/OpenFlipper/branches/Free@16081 383ad7c9-94d9-4d36-a494-682f7c89f535
---
 CMakeLists.txt                     |   2 +
 Shaders/ShaderGen/SG_LIGHTING.GLSL | 104 +++++++++++++++++++++++++++++
 2 files changed, 106 insertions(+)
 create mode 100644 CMakeLists.txt
 create mode 100644 Shaders/ShaderGen/SG_LIGHTING.GLSL

diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..bfe21ca
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,2 @@
+include (plugin)
+openflipper_plugin ( INSTALLDATA Shaders  )
diff --git a/Shaders/ShaderGen/SG_LIGHTING.GLSL b/Shaders/ShaderGen/SG_LIGHTING.GLSL
new file mode 100644
index 0000000..3d09276
--- /dev/null
+++ b/Shaders/ShaderGen/SG_LIGHTING.GLSL
@@ -0,0 +1,104 @@
+
+#define SHININESS g_vMaterial.x
+#define TRANSPARENCY g_vMaterial.y
+#define ALPHA g_vMaterial.y
+
+vec3 LitPointLight(vec3 vPosition,
+				   vec3 vNormal,
+				   vec3 vLightPos,
+				   vec3 cLightAmbient,
+				   vec3 cLightDiffuse,
+				   vec3 cLightSpecular,
+				   vec3 vLightAtten)
+{
+	vec3 vLightVS = vPosition - vLightPos;
+	float fLen2 = dot(vLightVS, vLightVS);
+	float fLen = sqrt(fLen2);
+	
+	vec3 vLightDir = vLightVS / fLen;
+	
+	// ambient
+	vec3 cLight = cLightAmbient * g_cAmbient;
+	
+	// diffuse
+	float ldotn = clamp(dot(vLightDir, vNormal), 0.0, 1.0);
+	cLight += ldotn * cLightDiffuse * g_cDiffuse;
+ 
+	// specular
+	vec3 h = normalize(vLightDir - normalize(vPosition)); // half vector between light and view direction
+	float hdotn = max(dot(h, vNormal), 0.0);
+	cLight += (pow(hdotn, SHININESS) * cLightSpecular) * g_cSpecular;
+	
+	
+	// attenuate
+	float fAtten = vLightAtten.x + vLightAtten.y * fLen + vLightAtten.z * fLen2;
+	
+	return cLight / fAtten;
+}
+
+
+vec3 LitDirLight(vec3 vPosition,
+				 vec3 vNormal,
+				 vec3 vLightDir,
+				 vec3 cLightAmbient,
+				 vec3 cLightDiffuse,
+				 vec3 cLightSpecular)
+{	
+	// ambient
+	vec3 cLight = cLightAmbient * g_cAmbient;
+	
+	// diffuse
+	float ldotn = clamp(dot(vLightDir, vNormal), 0.0, 1.0);
+	cLight += ldotn * cLightDiffuse * g_cDiffuse;
+
+	// specular
+	vec3 h = normalize(vLightDir - normalize(vPosition)); // half vector between light and view direction
+	float hdotn = max(dot(h, vNormal), 0.0);
+	cLight += (pow(hdotn, SHININESS) * cLightSpecular) * g_cSpecular;
+
+	return cLight;
+}
+
+
+
+vec3 LitSpotLight(vec3 vPosition,
+				  vec3 vNormal,
+				  vec3 vLightPos,
+				  vec3 vSpotLightDir,
+				  vec3 cLightAmbient,
+				  vec3 cLightDiffuse,
+				  vec3 cLightSpecular,
+				  vec3 vLightAtten,
+				  vec2 vLightSpotAngleExp)
+{
+	vec3 vLightVS = vPosition - vLightPos;
+	float fLen2 = dot(vLightVS, vLightVS);
+	float fLen = sqrt(fLen2);
+	
+	vec3 vLightDir = vLightVS / fLen;
+	
+	// ambient
+	vec3 cLight = cLightAmbient * g_cAmbient;
+	
+	// diffuse
+	float ldotn = clamp(dot(vLightDir, vNormal), 0.0, 1.0);
+	cLight += ldotn * cLightDiffuse * g_cDiffuse;
+
+	// specular
+	vec3 h = normalize(vLightDir - normalize(vPosition)); // half vector between light and view direction
+	float hdotn = max(dot(h, vNormal), 0.0);
+	cLight += (pow(hdotn, SHININESS) * cLightSpecular) * g_cSpecular;
+
+	
+	
+	// attenuate
+	float fAtten = vLightAtten.x + vLightAtten.y * fLen + vLightAtten.z * fLen2;
+	
+	// spot angle falloff
+	float fSpot = -dot(vLightDir, vSpotLightDir);
+	fSpot *= step(vLightSpotAngleExp.x, fSpot);
+	fSpot *= pow(fSpot, vLightSpotAngleExp.y);
+	
+	return cLight * (fSpot / fAtten);
+}
+
-- 
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